Multilayered film composed of(meth)acrylate copolymer and polycarbonate
CA 2553579 C · Owner: Hoellebauer, Andreas · Inventors: Dassinger, Gabriele; Reinheimer, Eric; Ruppel, Mona
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a multilayered film comprising at least one upper layer a), a middle layer b) made of (meth)acrylate copolymer and a supporting , layer c) made of polycarbonate. Upper layer a) contains a light-stability agent and is made of a (meth)acrylate copolymer that together with the , polycarbonate of supporting layer c) can form partially compatible mixtures. A test piece, which is made from a mixture consisting of 20 % by weight of (meth)acrylate copolymer and 80 % by weight of polycarbonate has a breaking , elongation (ISO 527-2) of at least 75 % at 23 ~C. The middle layer b) contains a colorant and, optionally, a light-stability agent and is made from an identical …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed September 15, 2004 and granted June 18, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 15, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 15, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.